<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>

<body>
  <div id="app">
    <h1>{{count}}</h1>
    <button @click="Event">按钮1</button>
    <button @click="add">按钮2</button>
    <button @click="addAndEvent(2,$event)">按钮3</button>
  </div>
  <script>
    Vue.config.productionTip = false;
    //实例化Vue
    const vm = new Vue({
      el: "#app",
      data() {
        return {
          count:0
        }
      },
      methods:{
        Event(event){
          console.log(event);
        },
        add(){
          this.count++
        },
        addAndEvent(num,e){
          this.count+=num
          console.log(e);
        }
      }
    })
  </script>
</body>

</html>